Improvement in regenerators for metallurgsc furnaces



A. PONSARD. improvement in Regeneratorefor Metallurgie Furnaces.

lN0 v130313 Patented Aug. 611872.

l I l I UNITED .STATES f PATEllLQEElCE.

AUGUSTE IONSARD, OF PARIS, FRANCE.

IKMPRovEMENT-'IN REGENERATORS FOR MET'ALL-uRcic'FuRNAcEs.

ASpecification forming part of Letters Patent No. 130,313, dated August 6, 1872.

Specication describing an Improved Heat- Restorer applicable to Metallurgie and other Furnaces, invented by AUGUSTE PoNsARD,

I of Paris, in the Republic of France.

This invention relates to furnaces in which the employment of the waste heat therefrom is utilized for the heating of the air which is employed to sustain combustion. Its objects arerrst, to avoid the reversal of the direction of the waste gases and air, which necessitates the employment of valves, the great heat of which renders their operation very difficult; secondly, to avoid the variations of temperature of the air which are produced in what are called recuperators, in which there is a reversal of the direction of the air and gases, and thereby to obtain a greater uniformity of temperature of the fur- ,nace5 thirdly, to condense into a very restricted space a large amount of heating-surface. To carry out these objects my improved heat-restorer is composed of a series of parallel walls, constituting a series of passages or chambers, in which circulate .the hot gases and the air to be heated in such manner that each vertical air-chamber is comprised between two similar chambers filled with hot gases, and vice versa; and the said air and gas chambers, or either of them, are furnished with checks or obstructions for the purpose of retarding the circulation of the air and gases, as welll as of augmenting the heating-surface. These obstructions or checks are composed of hollow bricks, which constitute transverse air and gas passages between the several chambers, and so presenting additional heating-surface.

The apparatus represented in the accompanying drawing illustrates three different constructions, so far as the checks or obstructions in the chambers are considered viz., first, with'all of the said checks made of hollow brick, so that they form transverse passages both between the chambers and between the gas-chambers; second, with only those checks which are placed across the gas-chambers made of hollow bricks, those across the airchamber being of solid bricks.

Figure 1 of the drawing is a vertical section in the plane indicated by the line A B in Figs. 2 and 3. Fig. 2 is a vertical section at right angles to Fig. 1 in the plane indicated by the line C D in Figs. 2 and 3. Fig. 3 is a horizontal section in the plane indica-ted by the line E F in Figs. 1 and 2.

Similar letters of reference indicate corresponding parts in the several igures.

a is the inlet of the hot gases of combustion, extending over the Whole arca of the top of the structure. b b are the vertical passages or chambers, by which the hot gases descend to the outlets c c-at the bottom of the structure, whence they escape to the chimney. d d are the cold-air inlets, situated near the bottom of the structure, and communicating with the vertical air passages or chambers e c, with outlets f fnear the top of the structure, whence the air, after having been heated in said chambers or passages, passes out to the nre-place of the furnace, or to any other place where the heated air is to be used. g g, in Figs. 2 and 3, are the vertical partition-walls, which separate and form the air and gas passages o1l chambers. The dotted arrows in Figs. 1 and 2 indicate the downward course of the hot gases of combustion through the passages or chambers b b, and the black arrows in the same figures indicate the upward course of the air through the passages or chambers c e.

An attentive inspection of the part on the left-hand side of the line x .fr in Figs. 1 and 3 shows the gas chambers or passages b b.com municating together laterally by means of hollow bricks h h, which are arranged across and form checks or obstacles within the air chambers or passages e e, and also that the air chambers or passages e e communicate together by means of hollow bricks t' i, which are arranged across and form checks within the gas chambers or passages b b. It results from this arrangement not only that the gases heat in their course not only the partitionwalls at the sides of the passages or chambers b b, but also the eXteriors of all the hollow bricks i i, through the interiors of which the air passes between the chambers e e, but also the interiors of all the hollow bricks h h, which form communications between the passages b b, and whichform the checks within the passages e e.

In the portion of the apparatus included between the lines fr a: and y y only the bricks bers or passages hereinabove mentioned, said Walls constructed of hollow:r bricks arranged across the said chambers, substantially as and for the purpose herein described.

AU. PONSARD. [L S.]

Witnesses DUREN, LALIRE, AND. 

